<?php
/**
 * REST API Order Refunds controller
 *
 * Handles requests to the /orders/<order_id>/refunds endpoint.
 *
 * @author   WooThemes
 * @category API
 * @package  WooCommerce/API
 * @since    2.6.0
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * REST API Order Refunds controller class.
 *
 * @package WooCommerce/API
 * @extends WC_REST_Orders_Controller
 */
class WC_REST_Order_Refunds_Controller extends WC_REST_Orders_Controller {

	/**
	 * Endpoint namespace.
	 *
	 * @var string
	 */
	protected $namespace = 'wc/v2';

	/**
	 * Route base.
	 *
	 * @var string
	 */
	protected $rest_base = 'orders/(?P<order_id>[\d]+)/refunds';

	/**
	 * Post type.
	 *
	 * @var string
	 */
	protected $post_type = 'shop_order_refund';

	/**
	 * Stores the request.
	 * @var array
	 */
	protected $request = array();

	/**
	 * Order refunds actions.
	 */
	public function __construct() {
		add_filter( "woocommerce_rest_{$this->post_type}_object_trashable", '__return_false' );
	}

	/**
	 * Register the routes for order refunds.
	 */
	public function register_routes() {
		register_rest_route( $this->namespace, '/' . $this->rest_base, array(
			'args' => array(
				'order_id'  => array(
					'description' => __( 'The order ID.', 'woocommerce' ),
					'type'        => 'integer',
				),
			),
			array(
				'methods'             => WP_REST_Server::READABLE,
				'callback'            => array( $this, 'get_items' ),
				'permission_callback' => array( $this, 'get_items_permissions_check' ),
				'args'                => $this->get_collection_params(),
			),
			array(
				'methods'             => WP_REST_Server::CREATABLE,
				'callback'            => array( $this, 'create_item' ),
				'permission_callback' => array( $this, 'create_item_permissions_check' ),
				'args'                => $this->get_endpoint_args_for_item_schema( WP_REST_Server::CREATABLE ),
			),
			'schema' => array( $this, 'get_public_item_schema' ),
		) );

		register_rest_route( $this->namespace, '/' . $this->rest_base . '/(?P<id>[\d]+)', array(
			'args' => array(
				'order_id'  => array(
					'description' => __( 'The order ID.', 'woocommerce' ),
					'type'        => 'integer',
				),
				'id' => array(
					'description' => __( 'Unique identifier for the resource.', 'woocommerce' ),
					'type'        => 'integer',
				),
			),
			array(
				'methods'             => WP_REST_Server::READABLE,
				'callback'            => array( $this, 'get_item' ),
				'permission_callback' => array( $this, 'get_item_permissions_check' ),
				'args'                => array(
					'context' => $this->get_context_param( array( 'default' => 'view' ) ),
				),
			),
			array(
				'methods'             => WP_REST_Server::DELETABLE,
				'callback'            => array( $this, 'delete_item' ),
				'permission_callback' => array( $this, 'delete_item_permissions_check' ),
				'args'                => array(
					'force' => array(
						'default'     => true,
						'type'        => 'boolean',
						'description' => __( 'Required to be true, as resource does not support trashing.', 'woocommerce' ),
					),
				),
			),
			'schema' => array( $this, 'get_public_item_schema' ),
		) );
	}

	/**
	 * Get object.
	 *
	 * @since  3.0.0
	 * @param  int $id Object ID.
	 * @return WC_Data
	 */
	protected function get_object( $id ) {
		return wc_get_order( $id );
	}

	/**
	 * Get formatted item data.
	 *
	 * @since  3.0.0
	 * @param  WC_Data $object WC_Data instance.
	 * @return array
	 */
	protected function get_formatted_item_data( $object ) {
		$data              = $object->get_data();
		$format_decimal    = array( 'amount' );
		$format_date       = array( 'date_created' );
		$format_line_items = array( 'line_items' );

		// Format decimal values.
		foreach ( $format_decimal as $key ) {
			$data[ $key ] = wc_format_decimal( $data[ $key ], $this->request['dp'] );
		}

		// Format date values.
		foreach ( $format_date as $key ) {
			$datetime              = $data[ $key ];
			$data[ $key ]          = wc_rest_prepare_date_response( $datetime, false );
			$data[ $key . '_gmt' ] = wc_rest_prepare_date_response( $datetime );
		}

		// Format line items.
		foreach ( $format_line_items as $key ) {
			$data[ $key ] = array_values( array_map( array( $this, 'get_order_item_data' ), $data[ $key ] ) );
		}

		return array(
			'id'               => $object->get_id(),
			'date_created'     => $data['date_created'],
			'date_created_gmt' => $data['date_created_gmt'],
			'amount'           => $data['amount'],
			'reason'           => $data['reason'],
			'refunded_by'      => $data['refunded_by'],
			'meta_data'        => $data['meta_data'],
			'line_items'       => $data['line_items'],
		);
	}

	/**
	 * Prepare a single order output for response.
	 *
	 * @since  3.0.0
	 *
	 * @param  WC_Data         $object  Object data.
	 * @param  WP_REST_Request $request Request object.
	 *
	 * @return WP_Error|WP_REST_Response
	 */
	public function prepare_object_for_response( $object, $request ) {
		$this->request = $request;
		$order         = wc_get_order( (int) $request['order_id'] );

		if ( ! $order ) {
			return new WP_Error( 'woocommerce_rest_invalid_order_id', __( 'Invalid order ID.', 'woocommerce' ), 404 );
		}

		if ( ! $object || $object->get_parent_id() !== $order->get_id() ) {
			return new WP_Error( 'woocommerce_rest_invalid_order_refund_id', __( 'Invalid order refund ID.', 'woocommerce' ), 404 );
		}

		$data    = $this->get_formatted_item_data( $object );
		$context = ! empty( $request['context'] ) ? $request['context'] : 'view';
		$data    = $this->add_additional_fields_to_object( $data, $request );
		$data    = $this->filter_response_by_context( $data, $context );

		// Wrap the data in a response object.
		$response = rest_ensure_response( $data );

		$response->add_links( $this->prepare_links( $object, $request ) );

		/**
		 * Filter the data for a response.
		 *
		 * The dynamic portion of the hook name, $this->post_type,
		 * refers to object type being prepared for the response.
		 *
		 * @param WP_REST_Response $response The response object.
		 * @param WC_Data          $object   Object data.
		 * @param WP_REST_Request  $request  Request object.
		 */
		return apply_filters( "woocommerce_rest_prepare_{$this->post_type}_object", $response, $object, $request );
	}

	/**
	 * Prepare links for the request.
	 *
	 * @param WC_Data         $object  Object data.
	 * @param WP_REST_Request $request Request object.
	 * @return array                   Links for the given post.
	 */
	protected function prepare_links( $object, $request ) {
		$base     = str_replace( '(?P<order_id>[\d]+)', $object->get_parent_id(), $this->rest_base );
		$links    = array(
			'self' => array(
				'href' => rest_url( sprintf( '/%s/%s/%d', $this->namespace, $base, $object->get_id() ) ),
			),
			'collection' => array(
				'href' => rest_url( sprintf( '/%s/%s', $this->namespace, $base ) ),
			),
			'up' => array(
				'href' => rest_url( sprintf( '/%s/orders/%d', $this->namespace, $object->get_parent_id() ) ),
			),
		);

		return $links;
	}

	/**
	 * Prepare objects query.
	 *
	 * @since  3.0.0
	 * @param  WP_REST_Request $request Full details about the request.
	 * @return array
	 */
	protected function prepare_objects_query( $request ) {
		$args = parent::prepare_objects_query( $request );

		$args['post_status']     = array_keys( wc_get_order_statuses() );
		$args['post_parent__in'] = array( absint( $request['order_id'] ) );

		return $args;
	}

	/**
	 * Prepares one object for create or update operation.
	 *
	 * @since  3.0.0
	 * @param  WP_REST_Request $request Request object.
	 * @param  bool            $creating If is creating a new object.
	 * @return WP_Error|WC_Data The prepared item, or WP_Error object on failure.
	 */
	protected function prepare_object_for_database( $request, $creating = false ) {
		$order = wc_get_order( (int) $request['order_id'] );

		if ( ! $order ) {
			return new WP_Error( 'woocommerce_rest_invalid_order_id', __( 'Invalid order ID.', 'woocommerce' ), 404 );
		}

		if ( 0 > $request['amount'] ) {
			return new WP_Error( 'woocommerce_rest_invalid_order_refund', __( 'Refund amount must be greater than zero.', 'woocommerce' ), 400 );
		}

		// Create the refund.
		$refund = wc_create_refund( array(
			'order_id'       => $order->get_id(),
			'amount'         => $request['amount'],
			'reason'         => empty( $request['reason'] ) ? null : $request['reason'],
			'line_items'     => $request['line_items'],
			'refund_payment' => is_bool( $request['api_refund'] ) ? $request['api_refund'] : true,
			'restock_items'  => true,
		) );

		if ( is_wp_error( $refund ) ) {
			return new WP_Error( 'woocommerce_rest_cannot_create_order_refund', $refund->get_error_message(), 500 );
		}

		if ( ! $refund ) {
			return new WP_Error( 'woocommerce_rest_cannot_create_order_refund', __( 'Cannot create order refund, please try again.', 'woocommerce' ), 500 );
		}

		/**
		 * Filters an object before it is inserted via the REST API.
		 *
		 * The dynamic portion of the hook name, `$this->post_type`,
		 * refers to the object type slug.
		 *
		 * @param WC_Data         $coupon   Object object.
		 * @param WP_REST_Request $request  Request object.
		 * @param bool            $creating If is creating a new object.
		 */
		return apply_filters( "woocommerce_rest_pre_insert_{$this->post_type}_object", $refund, $request, $creating );
	}

	/**
	 * Save an object data.
	 *
	 * @since  3.0.0
	 * @param  WP_REST_Request $request  Full details about the request.
	 * @param  bool            $creating If is creating a new object.
	 * @return WC_Data|WP_Error
	 */
	protected function save_object( $request, $creating = false ) {
		try {
			$object = $this->prepare_object_for_database( $request, $creating );

			if ( is_wp_error( $object ) ) {
				return $object;
			}

			return $this->get_object( $object->get_id() );
		} catch ( WC_Data_Exception $e ) {
			return new WP_Error( $e->getErrorCode(), $e->getMessage(), $e->getErrorData() );
		} catch ( WC_REST_Exception $e ) {
			return new WP_Error( $e->getErrorCode(), $e->getMessage(), array( 'status' => $e->getCode() ) );
		}
	}

	/**
	 * Get the Order's schema, conforming to JSON Schema.
	 *
	 * @return array
	 */
	public function get_item_schema() {
		$schema = array(
			'$schema'    => 'http://json-schema.org/draft-04/schema#',
			'title'      => $this->post_type,
			'type'       => 'object',
			'properties' => array(
				'id' => array(
					'description' => __( 'Unique identifier for the resource.', 'woocommerce' ),
					'type'        => 'integer',
					'context'     => array( 'view', 'edit' ),
					'readonly'    => true,
				),
				'date_created' => array(
					'description' => __( "The date the order refund was created, in the site's timezone.", 'woocommerce' ),
					'type'        => 'date-time',
					'context'     => array( 'view', 'edit' ),
					'readonly'    => true,
				),
				'date_created_gmt' => array(
					'description' => __( "The date the order refund was created, as GMT.", 'woocommerce' ),
					'type'        => 'date-time',
					'context'     => array( 'view', 'edit' ),
					'readonly'    => true,
				),
				'amount' => array(
					'description' => __( 'Refund amount.', 'woocommerce' ),
					'type'        => 'string',
					'context'     => array( 'view', 'edit' ),
				),
				'reason' => array(
					'description' => __( 'Reason for refund.', 'woocommerce' ),
					'type'        => 'string',
					'context'     => array( 'view', 'edit' ),
				),
				'refunded_by' => array(
					'description' => __( 'User ID of user who created the refund.', 'woocommerce' ),
					'type'        => 'integer',
					'context'     => array( 'view', 'edit' ),
				),
				'meta_data' => array(
					'description' => __( 'Meta data.', 'woocommerce' ),
					'type'        => 'array',
					'context'     => array( 'view', 'edit' ),
					'items'       => array(
						'type'       => 'object',
						'properties' => array(
							'id' => array(
								'description' => __( 'Meta ID.', 'woocommerce' ),
								'type'        => 'integer',
								'context'     => array( 'view', 'edit' ),
								'readonly'    => true,
							),
							'key' => array(
								'description' => __( 'Meta key.', 'woocommerce' ),
								'type'        => 'string',
								'context'     => array( 'view', 'edit' ),
							),
							'value' => array(
								'description' => __( 'Meta value.', 'woocommerce' ),
								'type'        => 'string',
								'context'     => array( 'view', 'edit' ),
							),
						),
					),
				),
				'line_items' => array(
					'description' => __( 'Line items data.', 'woocommerce' ),
					'type'        => 'array',
					'context'     => array( 'view', 'edit' ),
					'items'       => array(
						'type'       => 'object',
						'properties' => array(
							'id' => array(
								'description' => __( 'Item ID.', 'woocommerce' ),
								'type'        => 'integer',
								'context'     => array( 'view', 'edit' ),
								'readonly'    => true,
							),
							'name' => array(
								'description' => __( 'Product name.', 'woocommerce' ),
								'type'        => 'string',
								'context'     => array( 'view', 'edit' ),
							),
							'product_id' => array(
								'description' => __( 'Product ID.', 'woocommerce' ),
								'type'        => 'integer',
								'context'     => array( 'view', 'edit' ),
							),
							'variation_id' => array(
								'description' => __( 'Variation ID, if applicable.', 'woocommerce' ),
								'type'        => 'integer',
								'context'     => array( 'view', 'edit' ),
							),
							'quantity' => array(
								'description' => __( 'Quantity ordered.', 'woocommerce' ),
								'type'        => 'integer',
								'context'     => array( 'view', 'edit' ),
							),
							'tax_class' => array(
								'description' => __( 'Tax class of product.', 'woocommerce' ),
								'type'        => 'integer',
								'context'     => array( 'view', 'edit' ),
							),
							'subtotal' => array(
								'description' => __( 'Line subtotal (before discounts).', 'woocommerce' ),
								'type'        => 'string',
								'context'     => array( 'view', 'edit' ),
							),
							'subtotal_tax' => array(
								'description' => __( 'Line subtotal tax (before discounts).', 'woocommerce' ),
								'type'        => 'string',
								'context'     => array( 'view', 'edit' ),
								'readonly'    => true,
							),
							'total' => array(
								'description' => __( 'Line total (after discounts).', 'woocommerce' ),
								'type'        => 'string',
								'context'     => array( 'view', 'edit' ),
							),
							'total_tax' => array(
								'description' => __( 'Line total tax (after discounts).', 'woocommerce' ),
								'type'        => 'string',
								'context'     => array( 'view', 'edit' ),
								'readonly'    => true,
							),
							'taxes' => array(
								'description' => __( 'Line taxes.', 'woocommerce' ),
								'type'        => 'array',
								'context'     => array( 'view', 'edit' ),
								'readonly'    => true,
								'items'       => array(
									'type'       => 'object',
									'properties' => array(
										'id' => array(
											'description' => __( 'Tax rate ID.', 'woocommerce' ),
											'type'        => 'integer',
											'context'     => array( 'view', 'edit' ),
										),
										'total' => array(
											'description' => __( 'Tax total.', 'woocommerce' ),
											'type'        => 'string',
											'context'     => array( 'view', 'edit' ),
										),
										'subtotal' => array(
											'description' => __( 'Tax subtotal.', 'woocommerce' ),
											'type'        => 'string',
											'context'     => array( 'view', 'edit' ),
										),
									),
								),
							),
							'meta_data' => array(
								'description' => __( 'Meta data.', 'woocommerce' ),
								'type'        => 'array',
								'context'     => array( 'view', 'edit' ),
								'items'       => array(
									'type'       => 'object',
									'properties' => array(
										'id' => array(
											'description' => __( 'Meta ID.', 'woocommerce' ),
											'type'        => 'integer',
											'context'     => array( 'view', 'edit' ),
											'readonly'    => true,
										),
										'key' => array(
											'description' => __( 'Meta key.', 'woocommerce' ),
											'type'        => 'string',
											'context'     => array( 'view', 'edit' ),
										),
										'value' => array(
											'description' => __( 'Meta value.', 'woocommerce' ),
											'type'        => 'string',
											'context'     => array( 'view', 'edit' ),
										),
									),
								),
							),
							'sku' => array(
								'description' => __( 'Product SKU.', 'woocommerce' ),
								'type'        => 'string',
								'context'     => array( 'view', 'edit' ),
								'readonly'    => true,
							),
							'price' => array(
								'description' => __( 'Product price.', 'woocommerce' ),
								'type'        => 'string',
								'context'     => array( 'view', 'edit' ),
								'readonly'    => true,
							),
						),
					),
				),
				'api_refund' => array(
					'description' => __( 'When true, the payment gateway API is used to generate the refund.', 'woocommerce' ),
					'type'        => 'boolean',
					'context'     => array( 'edit' ),
					'default'     => true,
				),
			),
		);

		return $this->add_additional_fields_schema( $schema );
	}

	/**
	 * Get the query params for collections.
	 *
	 * @return array
	 */
	public function get_collection_params() {
		$params = parent::get_collection_params();

		unset( $params['status'], $params['customer'], $params['product'] );

		return $params;
	}
}